7914 doesn't show red light

Hi All,

we are using UC520 with telephony 4.2(0). in phone configuration, use "w" button for watching the line. 7914 doesn't show red light if someone is on the phone sometimes, not always. it has S00105000200 firmware. do I need to upgrade firmware?

I'm not able to access my old voice mail messages all of a sudden. The recording says something like 'the message is currently not available'. This has never happened before in all the years I have been using this system. I have t...
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